Improve text extraction in dashboard

package.json

@@ -15,11 +15,14 @@
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
     "ejs": "^3.1.10",
+    "exceljs": "^4.4.0",
     "express": "^4.19.2",
     "express-session": "^1.18.0",
     "form-data": "^4.0.3",
     "fs-extra": "^11.2.0",
+    "mammoth": "^1.9.1",
     "multer": "^2.0.0",
+    "pdf-parse": "^1.1.1",
     "uuid": "^10.0.0"
   },
   "devDependencies": {